The Great Goblin + Mortuary + Impulsive Pilferer + Altar of Dementia

The Great Goblin

Mortuary

Impulsive Pilferer

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Impulsive Pilferer
2. When Impulsive Pilferer dies, it, The Great Goblin's second ability and Mortuary trigger.
3. Resolve the Impulsive Pilferer trigger, creating a Treasure token.
4. Resolve the Mortuary trigger, putting Impulsive Pilferer onto the top of your library from your graveyard.
5. Resolve the Great Goblin trigger, exiling Impulsive Pilferer from the top of your library with the ability to play it until the end of your next turn.
6. Resolve the Altar of Dementia ability.
7. Activate the Treasure by tapping and sacrificing it, adding .
8. Cast Impulsive Pilferer from exile by paying .
9. Repeat